Limit governor for internal-combustion engines



Aug. 30, 1927.

G. NIEDEREHE ET A1.

LIMIT IGOVERNOR FOR INTERNAL 'COMBUSTION ENGINES 'n Filed April 17. 1924 Patented Aug. 3Q, 1927. I'

UNITE-D STATES GUs'i'AvE NIEDEnEEE `AND WILLIAM E.

LAWRENCE, oF BROOKLYN, NEW Yoax.

LIMIT GOVERNOR FOR INTERNAL-COMBUSTION ENGINES.

miliardariI inea April i7,

The device of the present invention contemplates the provisionof a control adapted to function after the manner of a governor for restricting and regulating the fuel flow to the intake manifold of the engine, whereby to prevent. the engine from running be# yond a predetermined speed. The device of the present invention is designed primarily for use in connection with motor trucks, although without any material changes it may be used in connection with other types of motor vehicles and stationary motors.

A primary object of theinvention is to provide 4an elicient fuel-control of simple and inexpensive construction which lcan be quickly and conveniently incorporated, more particularly in motor truck engines, in the fuel-supply connections between the carburetor and the intake manifold of the engine.

Another object of thel invention is to provide a fuel-control that is not affected in any way by the usual operations of the throttle control, but which operates. automatically under the suction pull exerted by the engine to restrict the quantity of fuel passing to the intakeV and thereby to limit the speed of the engine. v

According to an important feature of my. invention, provision is made through the employment of by-passes, controlled by gravity valves, for automatically satisfying the fuel requirements of the engine when climbing hills and upgrades.

To the attainment of the foregoing objects and advantages, the invention embodies the peculiar construction and novel arrangement of parts hereinafter described and specifically pointed out in the appended claims. A

An illustrated embodiment of the invention is shown in the accompanying drawing, forming a material part ofthis specification, and in which-` Figure 1 is a central vertical sectional view showing myimproved fuel-control incorporated in the fuel-supply connections.

Fig. 2 is an underneath plan view of the device. i

Figs. 3 and 4 are end and side elevations, respectively, of the same.

With' more particular reference to the accompanying drawing, the numeral 5 represents a fuelesupply connection leading to the intake manifold of the engine, this connection in the embodiment shown, being rovided with al flange 6. 7 represents a uel- 1924. Serial No. 707,132.

supply connection that leads from the carburetor and is provided with a flange 8. My invention consists of a body 9 which is interposed between the connections 5 and 7 and is secured by bolts 10 between the flanges thereof. The body 9 consists of a casting,.preferably of rhomboidal shape as shown, provided through its more acute corners ll with cored holes 12 for the reception of the securing bolts 10.

Provided centrally through this casting is a circular passage 13 which is tapered or flared inwardly at 14 and is thence concenltrically reduced a's at l5, itv being observed that the larger end of this passage opens from the carbureter connection 7 while the reduced end thereof opens into the fuel-intake connection 5. Below the inwardly flared region 14, this passage is centrally spanned by an integral bridge 16 which is centrally holedand tapped at 17 to recive` the threaded portion 18 of the screw 19, in such manner that this screw extends centrally up through the inwardly-flared region 14 and into the reduced passage 15, as clearly shown' in Fig. 1.. Underneath the bridge, there is threaded upon the screw-19 a nut 20 having its face cut with cross grooves 21 to afford a choice of seats for a Cotter pin 22 which is passed through the vend of the screw. This arrangement provides means for normally. holding the screw against turning,y

while providing facilities for its convenient adjustment.

Slidably mounted upon the smooth portion of the screw over the bridge is a diskshaped valve or control 23 made with an upwardly projecting hub 24. The screw, adjacent its head, is made with an annular stepped up portion 25. Coiled about the stepped up portion 25 and about the hub 24 and confined between the head of the screw and 'the valve 23 is a push spring26, which normally urges the valve into its extreme open position upon the top of the bridge but which is sufficiently resilient to yield under the suction pull exerted by the engine so as to allow the valve to be drawn upwardly for the purpose of partially closing the cross-sectional area of the inwardly-tapered portion 14. The arrangement ofthe parts and the adjustment of the screw should be such that the stepped up portion 25 will serve as an abutment for the hub 24 so that the passage for the fuel will never 'be entirelyv closed.

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When 'the engine 'is running at low speed, the suction pull is not-sufficient tol raise the valve because of the urge of the spring. As

the speed of the engine increases the suction becomes more powerful until a point is climb of a hill or up a steep grade and thel suction pull is correspondingly increased. it is necessary that the quantity of fuel shall not be restricted, but that the engine shall be continuously supplied with charges of fuel sullicient to meet its requirements. To make provision for these requirements the casting on either side of one of the corners 11 is preferable made with a projecting portion 27 which is inclinedly cored with a hole 28,

' the direction of the inclination being downwardly as best shown in Fig. 1. Each hole, thus made ,opens directly into a by-pass 29 which provides communication betweenthe inwardly-dared region 14 and the connection 5 leading to the intake manifold. Disposed in each of the holes 28 isa ball valve 30 which normally rolls by gravity into the bypass the wall whereof is provided with a` concavity `or seat 31 for the partial reception of the ball valve as shown in Fig. 1. -i By means of this arrangement, the byassesfare normally-closed against the flow o fuel into the connection 5. Now, it is to be observed that the casting is so secured between the connections 5 and 7 that the holes 28 run lengthwise of the motor truck, so that when climbing a hill or steep grade, the ball valves,

, owing to the inclination of the motor`truck,

will be unseated by gravity, thereby -per mitting through the by-passes a lfree flow of the fuel into the connection 5. The outer ends of the holes 28 are tapped for the reception of screw-plug closures 32. Having thus described our invention, what we claim is:

1. A device automatically regulating the volume of the gas mixture supplied to the motor of an automobile, said device being vadapted to beinterposed between the car- Letoniay buretor and the intake manifold of the engine and consisting of a body having a passageway tapering inwardly in its upper part toend in a reduced channel, a screw -adjustably supported centrally of said passageway, a spring pressed diskshaped valve slidably mounted on said screw so as to choke the cross-sectional area of the inwardly tapered region, a vertically disposed vby-pass communicating with the passageway below and above the tapering portion of the same and provided in its wall with a valve seat, a slightly upwardly inclined straight channel, positioned lengthwise of the automobile with its highest closed end to the rear, and branching off the by-pass above the tapering portion, and closed at its outer end, and a gravity iniuenced rolling valve within the side channel adapted to normally rest in yits seat to close the by-pass.

2. A device automatically regulating the volume of the gas mixture supplied tothe motor of an automobile, said device being adapted to be interposed between the carburetorand the intake manifold of the engine and consisting of a ^body having a passageway tapering inwardly in its upper part to end in a reduced channel, a screw adjustably supported centrally of said passageway, a spring pressed disk-shaped valve slidably mounted on said screw so as -to choke the cross-sectional 'area of the inwardly tapered region, a vertically disposed by-pass com-- mumcatlng .with the passageway below and above the tapering portion of the same, and

provided in its wall with a valve seat, a slightly upwardly inclined straight channel, positioned lengthwise of the automobile with its highest closed end to the rear and branching off the by-pass above the tapering portion, and closed at its outer'end, and a gravity influenced rollin'g valve within the side channel adapted to normally rest in its seat to close the `loy-pass,said screw being progided with a stepped up portion at its head and said disk valve having a hub slidable on said screwand adapted to abut said stepped up ortion to limit the upward movement of sai .disk valve when choking the fuel passage.` n

Signed at Brooklyn, in the county of Kings and State of New York, this first day of April A. D. 1924.

GUSTANE NIEDEREHE. WILLIAM E. LAWRENCE. 

